Reference for a preliminary ruling from, the Corte dei Conti - Chamber responsible for verifying acts of the Government and of State Administrations - by order of 20 March and 7 April 1998 in proceedings involving the Ministry of Public Works, the Ministry of Finance, the Budget and Economic Planning, and ANAS - Azienda Nazionale Autonoma delle Strade (now Ente Nazionale per le Strade) (Case C-192/98)